EP2333977A2 - Techniques de commande de puissance de transmission pour systèmes de communication sans fil - Google Patents

Techniques de commande de puissance de transmission pour systèmes de communication sans fil Download PDF

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Publication number
EP2333977A2
EP2333977A2 EP11160663A EP11160663A EP2333977A2 EP 2333977 A2 EP2333977 A2 EP 2333977A2 EP 11160663 A EP11160663 A EP 11160663A EP 11160663 A EP11160663 A EP 11160663A EP 2333977 A2 EP2333977 A2 EP 2333977A2
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EP
European Patent Office
Prior art keywords
transmitter
transmit power
power level
transmitters
data transmission
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11160663A
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German (de)
English (en)
Other versions
EP2333977A3 (fr
Inventor
Simon Haykin
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McMaster University
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McMaster University
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Filing date
Publication date
Application filed by McMaster University filed Critical McMaster University
Publication of EP2333977A2 publication Critical patent/EP2333977A2/fr
Publication of EP2333977A3 publication Critical patent/EP2333977A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/265—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the quality of service QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0062—Avoidance of ingress interference, e.g. ham radio channels

Definitions

  • the communication theory algorithm comprises an iterative water-filling procedure which accounts for determined transmit power levels of the transmitter and other transmitters in the communication system.
  • the iterative water-filling procedure involves initializing a transmit power distribution across n transmitters, performing water-filling for the transmitter to determine a transmit power level for a target data transmission rate of the transmitter subject to a power constraint for the transmitter and a level of interference, the level of interference comprising a noise floor plus either initialized transmit power levels or previously determined transmit power levels for the other transmitters, determining whether a data transmission rate of the transmitter is greater than or less than a target data transmission rate of the transmitter, and if so, adjusting the determined transmit power level for the transmitter, determining whether a target data transmission rate of at least one of the n transmitters is not satisfied by a respective adjusted transmit power level for the at least one transmitter, and repeating the operation of performing water-filling where the target data transmission rate of at least one of the n transmitters is not satisfied.
  • the operations of performing, determining whether a data transmission rate of a transmitter is greater than or less than a target transmission rate, and adjusting are repeated for each of the other transmitters.
  • determining whether the target data transmission rate of at least one of the n transmitters is not satisfied comprises determining whether the data transmission rate differs from the target data transmission rate by a predetermined amount.
  • the method further comprises determining a multi-user path loss matrix of the operating environment of the transmitter based on the determined position of the transmitter relative to the other transmitters.
  • the learning algorithm comprises a regret-conscious learning algorithm.
  • Spectrum utilization can be improved significantly by making it possible for a secondary user who is not being serviced to access a spectrum hole which is not being utilized by the primary user at a current time and location of the secondary user.
  • Cognitive radio inclusive of software-defined radio, may offer a means to promote the efficient use of the spectrum by exploiting the existence of spectrum holes.
  • a cognitive radio looks naturally to software-defined radio. For other tasks of a cognitive kind, the cognitive radio looks to signal-processing and machine-learning procedures for their implementation.
  • the cognitive process in accordance with embodiments of the invention, starts with the passive sensing of RF stimuli and culminates with action.
  • the cognitive cycle shown in Fig. 1 pertains to a one-way communication path, with the transmitter 12 and the receiver 14 located in two different places.
  • both a receiver and a transmitter or alternatively a transceiver i.e., a combination of transmitter and receiver
  • All of the cognitive functions embodied in the cognitive cycle of Fig. 1 are then supported at each of a wireless communication device and a base station, for example.
  • the driving force behind competition in a multi-user environment lies in having to operate under the umbrella of limitations imposed on available network resources. Given such an environment, a particular user may try to exploit the cognitive radio channel for self-enrichment in one form or another, which, in turn, may prompt other users to do likewise. However, exploitation via competition should not be confused with the self-orientation of cognitive radio which involves the assignment of priority to certain stimuli (e.g., urgent requirements or needs).
  • the control of transmit power in a multi-user cognitive radio environment may operate under two stringent limitations on network resources, specifically an interference or interference-temperature limit which might be imposed by regulatory agencies or other entities, and the availability of a limited number of spectrum "holes" depending on usage.
  • Stochastic games are supersets of two kinds of decision processes, namely Markov decision process and matrix games, as illustrated in Fig. 2 .
  • a matrix game as shown at 22 is a special case of a stochastic game 24 with a single state, that is,
  • 1.
  • h ij denote the complex-valued channel coefficient from transmitter i to receiver j.
  • ⁇ , m , and d ij for all i and j , we may calculate the multi-user path-loss matrix.
  • Information associated with transmit behaviours of the other transmitters may be received by the processor 66 through a receiver in the transceiver 64 and the antenna(s) 62. More generally, the processor 66 has an input which receives transmit behaviour information associated with other transmitters in a communication system.
  • the processor 66 may perform these operations substantially as described above. Other operations may also be performed.
  • the processor 66 may participate directly or indirectly in corrective actions that affect "misbehaving" transmitters. Indirect participation may involve detecting transmit behaviours that are not consistent with assumed conditions under which a transmit power control algorithm operates most effectively and alerting another device or system to this detection. Direct participation would involve a corrective action being performed by the processor 66 itself.
  • a spectrum management algorithm may build on spectrum holes detected during radio-scene analysis, as described in the co-pending application incorporate above, and the output of a transmit power controller to select communication parameters such as a modulation strategy that adapt to the time-varying conditions of the radio environment, all the time assuring reliable communication across the channel. Communication reliability may be assured, for example, by choosing the SNR gap ⁇ large enough a priori, as discussed above.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transmitters (AREA)
EP11160663A 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systèmes de communication sans fil Withdrawn EP2333977A3 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US61763804P 2004-10-13 2004-10-13
US61763904P 2004-10-13 2004-10-13
EP05797181A EP1805909B1 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systemes de communication sans fil

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP05797181.4 Division 2005-10-13

Publications (2)

Publication Number Publication Date
EP2333977A2 true EP2333977A2 (fr) 2011-06-15
EP2333977A3 EP2333977A3 (fr) 2011-12-07

Family

ID=36148009

Family Applications (11)

Application Number Title Priority Date Filing Date
EP11160668A Withdrawn EP2333981A3 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systèmes de communication sans fil
EP11160664A Withdrawn EP2333980A3 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systèmes de communication sans fil
EP11158724A Withdrawn EP2334002A1 (fr) 2004-10-13 2005-10-13 Techniques d'analyse de l'environnement d'opération pour des systèmes de communication sans fil
EP11158721A Withdrawn EP2333999A1 (fr) 2004-10-13 2005-10-13 Techniques d'analyse de l'environnement d'opération pour des systèmes de communication sans fil
EP11160663A Withdrawn EP2333977A3 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systèmes de communication sans fil
EP11158723A Withdrawn EP2334001A1 (fr) 2004-10-13 2005-10-13 Techniques d'analyse de l'environnement d'opération pour des systèmes de communication sans fil
EP05797181A Expired - Lifetime EP1805909B1 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systemes de communication sans fil
EP05794586.7A Expired - Lifetime EP1805916B1 (fr) 2004-10-13 2005-10-13 Techniques d'analyse d'environnement opérationnel pour des systèmes de communication sans fil
EP11160665A Withdrawn EP2333978A3 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systèmes de communication sans fil
EP11160667A Withdrawn EP2333979A3 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systèmes de communication sans fil
EP11158722A Withdrawn EP2334000A1 (fr) 2004-10-13 2005-10-13 Techniques d'analyse de l'environnement d'opération pour des systèmes de communication sans fil

Family Applications Before (4)

Application Number Title Priority Date Filing Date
EP11160668A Withdrawn EP2333981A3 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systèmes de communication sans fil
EP11160664A Withdrawn EP2333980A3 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systèmes de communication sans fil
EP11158724A Withdrawn EP2334002A1 (fr) 2004-10-13 2005-10-13 Techniques d'analyse de l'environnement d'opération pour des systèmes de communication sans fil
EP11158721A Withdrawn EP2333999A1 (fr) 2004-10-13 2005-10-13 Techniques d'analyse de l'environnement d'opération pour des systèmes de communication sans fil

Family Applications After (6)

Application Number Title Priority Date Filing Date
EP11158723A Withdrawn EP2334001A1 (fr) 2004-10-13 2005-10-13 Techniques d'analyse de l'environnement d'opération pour des systèmes de communication sans fil
EP05797181A Expired - Lifetime EP1805909B1 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systemes de communication sans fil
EP05794586.7A Expired - Lifetime EP1805916B1 (fr) 2004-10-13 2005-10-13 Techniques d'analyse d'environnement opérationnel pour des systèmes de communication sans fil
EP11160665A Withdrawn EP2333978A3 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systèmes de communication sans fil
EP11160667A Withdrawn EP2333979A3 (fr) 2004-10-13 2005-10-13 Techniques de commande de puissance de transmission pour systèmes de communication sans fil
EP11158722A Withdrawn EP2334000A1 (fr) 2004-10-13 2005-10-13 Techniques d'analyse de l'environnement d'opération pour des systèmes de communication sans fil

Country Status (5)

Country Link
US (4) US8060035B2 (fr)
EP (11) EP2333981A3 (fr)
CA (2) CA2583273C (fr)
ES (1) ES2397074T3 (fr)
WO (2) WO2006039800A1 (fr)

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